i saw a hand tool that measures draw weights up to 100 lbs at the local hardware store. Don't have a picture now, but that tool is battery operated with a hook at its base. When pulled on it, it gives a read of what the draw weight is in lbs. I wonder if this can be use to test bow draw weight and assuming you turned both limb bolts equally... i wanna set my parker spitfire bow to 60lbs from 55.